Porcelain pull-socket.



E. H. FREEMAN.

PORCELMN PULL SOCKET.

APPUCATION FILED NDL 3.1915.

1,262,320. Patented Apr. 9,191&

2 SHEETS-SHEET I NFH-Hulk f 1 E. H. FREEMAN.

PURCELAIN PULL SOCKET.

APPLICATION man noma. |915.

1 ,262,320. Patented Apr. 9, 1918.

2 SHEETS-SHEET 2- UNITED STATES` PATENT OFFICE.

EDGAR H. FREEMAN, 0F TRENTON, NEW JERSEY, ASSIGNOR T0 E. H. FREEMANELEC- TRIC CUMPANY, OF TRENTON, NEW JERSEY, A CORPORATION OF NEW'JERSEY.

PORCELAIN PULL-SOCKET.

Specification of Letters Iatent.

Patented Apr. 9, 1918.

To all whom t may concern.'

Be it known that I, Enma Il. FREEMAN, citizen of the United States,residing at Trenton, in the county of Mercer and State of New Jersey,have invented certain new and useful Improvements in Porcelain PullSockets, of which the following is a speciication.

This invention relates to electrical pull sockets of the type wherein apull chain, cord or equivalent llexible pull element is employed foroperating the socket switch to make and break the electrical circuitthrough the incandescent lamp.

A primary object of the invention is to provide a novel and practicalconstruction of all-porcelain pull socket, wherein all exterior metalparts are dispensed with, and a structure is produced possessing specialutilitv as a Weather-proof receptacle and speci cally meetin therequirements of the Fire Underwriters Association with respect tosockets of this character.

Another and important object of the invention is to improve the guidingmeans for the flexible pull element in order to olivi-.ite theprevailing objection to the unsatisfactory action of pull chainsparticularly in an all-porcelain type of pull socket. In that type ofpull sockets, great difficulty has so far been experienced in providingan easy movement and action for the pull chain. This action isordinarily stii and jerky, and in some directions of pull the pull chainis liable to become caught so as to actually interfere with theoperation oiimthe socket switch. Accordingly, one of the distinctivepurposes of the present invention is to provide an all-porcelain pullsocket ha ving adef quete and reliable means for smoothly and evenlyguiding the pull chain so that it will freely and readily draw away fromthe socket in any direction, at the saine time causing a positive andresponsive actuation of the socket switch. In' connection with thisphase of the invention, the saine contemplates a novel assembl of theinterior porcelain. arts with relation to the socket switch an itsoperating mechanism, said assembly being formed with special referenceto a proper guiding of the switch lever, and the pull element connectedtherewith.

With these and other objects in view Vwhich will readily appear to thosefamiliar with thi@ einen of devices. the invention consists in the novelconstruction, combination and arrangement of parts hereinafter morefully described, illustrated, and claimed.

The essential and distinctive features of the invention are susceptibleoi some strnctnral changes Without departing from the spirit or scopethereof, but a preferred and practical embodiment of the invention isshown in the accompanying drawings, in vvhich-w Figure l is alongitudinal sectional View of a porcelain pull socket embodying thepresent invention, and shown completely assembled, the line of sectionbeing indicated by the line l 1 of Fig.

Fig. 2 is asimilar view of the completely assembled socket on anotherline of section, designated by the line 2-2 of Fig.

Fig. is a cross sectional view on the line 3--3 of Fig. l.

Fig. 1i is a top plan view of the interior removable insulating capblock, which cooperates with the interior base block to provide aninsulated support and housing :for the working parts of the socketswitch.

Fig. 5 is a plan view of the under side. of said cap block.

Fig. ti is a perspective view of the porcelain socket body, with aportion of the Wall thereof broken away to expose the interiorinsulating base block and the cooperating elements of the guiding meansformed integrally with the porcelain body. 1.

Fig. 7 is a perspective view of the removable. cap block with all metalparts omitted, and exposing its portion of the guiding means for theswitch lever and the flexible pull element connecting therewith.

Figs. 8 and 9 are sectional views similar to Figs. 1 and 2 With allmetal parts ointted., to more clearly expose the structural features ofthe porcelain parts and their operative relation.

Like reference charmzters designate corresponding parts throughout theseveral figures of the drawings.

As already indicated, the distinctive and important features of thepresent invention reside in the structural characteristics of theporcelain parts and. their operative relation with special reference toforming novel and reliable means for smoothly and evenl)7 guidingtlupull chain regardless of the direction or angle of pull thereof.inglv. referring first to the primary ele- Accordment` of the inwntion.it will be obaerwd that (la socket bod) l is constructed oi' one piece ot' porcelain or equivalent ,inhalating material and has no externalmetal part-` associated therewith.

The `mill onepiere porcelain or equivalent Hochet bolliv l hanv l'ormeilinlogt-all) therewith. at an intermediate point between itsI oppositeends, a solid partition wall 2 which divides the interior ot' the bodyinto what nia be termed for convenience as an upper ewitrh compartmentIl and a lower plug receptacle L The upper switch com* pariment- `l iadapted to be entirely ine-loert! :ind covered by a .separate detachablepoi-ee lain eorer tomber haiing a lianncd edge portion t3 whirh overlapsand engages the peripheral entre of the bod)V at one end thereof.y timeprovidingr an effective z-ealin; r corel' for the body.

rllu- Folid partition wall z within the Socket body not only separatenand iaolateal one compartment of the bod) from the other, but alsoconstitutes an interior insulatingl base block l'or the socket switch.and to that end.y the said wall or base block in recfeeeed at its upperSide as at i' to provide a will-h chamber for the Soc-liet .wilch.l`nrthermore, at one edge. of its recerieled or chaln bcred side` the`Said wall or bane block is formed with a segmental rabbet 5 constitotinga guiding ledge, for the swinging' end o't' the Switch lever to bepresently referred to, and the rablieted formation which provides thisledge also produces stop shoulders 9 and 10 at the opposite ends thereoffor limiting the forward and back. 'ard more* ments of the switch lever.1n connection with the segmental ledge formation 8, it will be observedparticularly by reference to Figs. 6 and il of the drawings,` that whatmay be termed the outer end portion olE the guiding ledge. of the rabnetdirectly ad- ]oins a guide projection ll at one edge of which is formedthe shoulder 10, and whose outer" surface. 12 is evenly and smoothlyYcurved on the are of a circle wh'ich merges directly into the innerconvexl)` curved guide wall 13 of an outwardhv projectingguide. tube orhorn '1.

The inner guiding' wall i3 ot' the guide tube or horn li is 'formed onthe arc of a circle. so that aid wall not only merges, on curved lines.into the carved lraide surface 1:2 or' the projrrtion il, but alaomergeson a curved line into the inner wall of th hod ove-r the guiding ledgeS. thereby piovidingg n continuously carving guide surface at all pointsfor the. pull chain or equivalent fiexi ble pull element. Furthermore.tnc guide tube or horn 14 is formed as an integral part of the,porcelain bodv 1 and has a flared or bell month l5 so that the eXtremeouter edges of the tube are rounded or curved, thereby permitting thepull element to be smoothly and evenly drawn in any or all directionbWithout the objectionable ier-h which is common to the action oi' man)vconi mercial forme of pall soclnitaY \l o. in order to obtain the actiondem-ed. the fluide tube. 14 is preferably radial to the :wie` oi theJbody and not tangentially diallioeed.

ln order to properl)v provide l'or th'l mounting and housing of the:mitch parte. there is associated with the base block E an interiorremovable ilienllaiinf;A cap bloeit if?. also made of porcelain orerlniialent inenlating material. This cap block lite within the switchcrnnpartment 3, and through llamedium of the connecting' screws is heldin proper position upon the ,cuide project ion ll, and a correspondinerrest projet-lion IT formed at an opposite point williim the ,socketbody. '.l`he structural feature oi mr portance in the cap block 16 isthe formation in one edge thtreoiB of a segmental guiding .recess orgroove 18 whichlis cti-extensive with and over-lies the segmentalgattini;- ledge to complete the guiding mean` loi` the swinging end ofthe switch leve' and the pull4 element connecting therewith.

Any suitable pull switch mechanism ma;v be combined with the porcelainparta de acribed, bln" it is preferred to e1nplo a pull .switch of thegeneral character of thai til closed in my former Patent. No. naali.`dated June 13, 1911. This kind oi' switch is shown in the drawings, andreferringv een erally to the essential elements thereof. the. saineincludes a pair of Spring contact plate 4 19 and 20, one of said plates2U being conr nected by 21 with the center plug,` contact :L located inthe receptacle part of the body, and the other spring contact plate .19being connected through a line of connections 9:5: 24, 25 and 26 withone of the binding terminals 27. The other bindingr terminal 28 1sconnected by a hne of conneetione` 29, 30

and 31 with the screw shell Contact within the receptacle part of thesocket. Suitable connecting screws hold the various parte together inthe assembled relation shown.

In addition to the Contact springs 19 and 20, the pull socket switchincludes a rotatable cam element 33 and a ratchet operating mechanismhaving the swinging switch lever 3l to which is connected the inner endof the pull chain or equivalent flexible pull element 35. The relationof the switch lever and the pull chain element tothe various porcelainguiding elements erin referred to is plainly shown in Fig. 3 of thedrawings, and it will be observed therefrom that an easy and smoothguidingimovement '1s insured for both the switch lever and the pullelement So that a positive and reliable actuation of the switch isobtained without the jerkiness and catching incident to the operation ofmany forms of pull switches.

From the foregoing, it ia thought that the construction, action, andmany ad'vanafes of the hereindesciibed impl-omarmd will no readilyapparent Without further descripY tion, and it will bv understood thatchanges in the form propm'tion, and minor dotada of @Unstrut-tion may'rw i'tsortr'd to without departing from the spil-it or sacrilicag anyof the advantages of th(- invention.

I claim:

l. An all-porcelain pull socket ilnrlnding a porcelain body providedwith an interim integral hay block and fornnd with an iuteriol'segmental guiding; lodge and an integral outward projoctillg guidi'.tube having im iznQr wall curving' intr tlm lmdjv over `will ledge, aremovable porcelain Tap block seated upon the base block and having asegmental recess over said ledge, and a. souliei; Switch.

2. An all-porgelain pull socket including a poxcelain body provided withan interior integral basa block, and an interior segmental guiding'ledge and an integral outward }111oj0cting guido tulle, a removableporcelain cap block aeated upon the base block, a aockot switch housedlug-tween the two blocks, and a porselaiu cover n'lember arranged overone end of the body.

1n testimony whereof I hereunto afiix my 30 gnature in the presence oftwo witnesses. EDGAR H. FREEMAN.

fiaessos .fi im MARSH, Amen; A. HENRY.

